Fibonacci number
, has the limit φ the golden ratio. Binet's theorem states that the nth Fibonacci number equals 
. See also difference equation, generating function, Lucas numbers.
http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fib.html
• A site with examples of Fibonacci numbers in nature and the relationship to the golden section.
- equidistant
- equilateral
- equilibrium
- equinumerous
- equipollent
- equiprobable
- equivalence
- equivalence class
- equivalence relation
- equivalent
- equivalent norms
- equivariant map
- equi‐
- Eratosthenes of Cyrene
- Erdős conjecture
- Erdős number
- Erdős, Paul
- erf
- ergodic
- ergodic theory
- ERO
- error
- error analysis
- error function
- error‐correcting